[2/2] OmniGears: Lockscreen wallpaper

Base: https://gerrit.omnirom.org/5690

Change-Id: I0098b5f9fe03b26c842d50c7760999956c488d2e
[Patch 3] [2/2] OmniGears: Lockscreen wallpaper

Base: https://gerrit.omnirom.org/5690

link: https://gerrit.omnirom.org/#/c/6574/